otg_whitelist.h

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/*
 * drivers/usb/core/otg_whitelist.h
 *
 * Copyright (C) 2004 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

/*
 * This OTG Whitelist is the OTG "Targeted Peripheral List".  It should
 * mostly use of USB_DEVICE() or USB_DEVICE_VER() entries..
 *
 * YOU _SHOULD_ CHANGE THIS LIST TO MATCH YOUR PRODUCT AND ITS TESTING!
 */

static struct usb_device_id whitelist_table [] = {

/* hubs are optional in OTG, but very handy ... */
{ USB_DEVICE_INFO(USB_CLASS_HUB, 0, 0), },
{ USB_DEVICE_INFO(USB_CLASS_HUB, 0, 1), },

#ifdef  CONFIG_USB_PRINTER      /* ignoring nonstatic linkage! */
/* FIXME actually, printers are NOT supposed to use device classes;
 * they're supposed to use interface classes...
 */
{ USB_DEVICE_INFO(7, 1, 1) },
{ USB_DEVICE_INFO(7, 1, 2) },
{ USB_DEVICE_INFO(7, 1, 3) },
#endif

#ifdef  CONFIG_USB_NET_CDCETHER
/* Linux-USB CDC Ethernet gadget */
{ USB_DEVICE(0x0525, 0xa4a1), },
/* Linux-USB CDC Ethernet + RNDIS gadget */
{ USB_DEVICE(0x0525, 0xa4a2), },
#endif

#if defined(CONFIG_USB_TEST) || defined(CONFIG_USB_TEST_MODULE)
/* gadget zero, for testing */
{ USB_DEVICE(0x0525, 0xa4a0), },
#endif

{ } /* Terminating entry */
};

static int is_targeted(struct usb_device *dev)
{
    struct usb_device_id    *id = whitelist_table;

    /* possible in developer configs only! */
    if (!dev->bus->otg_port)
        return 1;

    /* HNP test device is _never_ targeted (see OTG spec 6.6.6) */
    if ((le16_to_cpu(dev->descriptor.idVendor) == 0x1a0a &&
         le16_to_cpu(dev->descriptor.idProduct) == 0xbadd))
        return 0;

    /* NOTE: can't use usb_match_id() since interface caches
     * aren't set up yet. this is cut/paste from that code.
     */
    for (id = whitelist_table; id->match_flags; id++) {
        if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
            id->idVendor != le16_to_cpu(dev->descriptor.idVendor))
            continue;

        if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
            id->idProduct != le16_to_cpu(dev->descriptor.idProduct))
            continue;

        /* No need to test id->bcdDevice_lo != 0, since 0 is never
           greater than any unsigned number. */
        if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
            (id->bcdDevice_lo > le16_to_cpu(dev->descriptor.bcdDevice)))
            continue;

        if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
            (id->bcdDevice_hi < le16_to_cpu(dev->descriptor.bcdDevice)))
            continue;

        if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
            (id->bDeviceClass != dev->descriptor.bDeviceClass))
            continue;

        if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
            (id->bDeviceSubClass != dev->descriptor.bDeviceSubClass))
            continue;

        if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
            (id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
            continue;

        return 1;
    }

    /* add other match criteria here ... */


    /* OTG MESSAGE: report errors here, customize to match your product */
    dev_err(&dev->dev, "device v%04x p%04x is not supported\n",
        le16_to_cpu(dev->descriptor.idVendor),
        le16_to_cpu(dev->descriptor.idProduct));
#ifdef  CONFIG_USB_OTG_WHITELIST
    return 0;
#else
    return 1;
#endif
}